Re: [boost] [challenge!] find a common domain

Subject: Re: [boost] [challenge!] find a common domain
From: Eric Niebler (eric_at_[hidden])
Date: 2010-05-19 15:45:48

On 5/19/2010 11:52 AM, Jeremiah Willcock wrote:
> On Tue, 18 May 2010, Eric Niebler wrote:
> 
> (snip)
> 
>> Your job: implement the deduce_domain3 template that finds the common
>> domain of 3 domains. You're allowed to use decltype, but you get bonus
>> points for a solution that doesn't. Bonus also for instantiating fewest
>> templates. The challenge is for the ternary case, but your solution
>> should scale to N domains. If your solution is better than mine, I'll
>> use it in Proto and credit you!
> 
> My solution attempt is attached.  It should be standard C++03 (no
> decltype).  The ternary case is just built as a pair of applications of
> a binary deduce_domain2 template, so adding more parameters should be
> straightforward.

That was fast! But does it work for all cases? I'll need to plug it back
into my test harness and see.

-- 
Eric Niebler
BoostPro Computing
http://www.boostpro.com